Home / 20,896.05-31,343.75-8,415.78

Finding the Fourth Proportional to 20,896.05, 31,343.75 and 8,415.78

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Solution

The fourth proportional to 20,896.05, 31,343.75 and 8,415.78 is: 12,623.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,896.05 : 31,343.75 = 8,415.78 : x
  2. Step 2: Convert to fraction form
    20,896.05/31,343.75 = 8,415.78/x
  3. Step 3: Cross multiply
    20,896.05x = 31,343.75 × 8,415.78
  4. Step 4: Simplify right side
    20,896.05x = 263,782,062.30
  5. Step 5: Solve for x
    x = 263,782,062.30/20,896.05
  6. Step 6: Final answer
    x = 12,623.54

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.